Filter



Jan. 19. 1954 I W, G LANDWlER 2,666,529

FILTER Filed July 18, 1950 [NVEN TD 1? WILLIAM G. LANDWIEE ATTORNEY Patented Jan. 19, 1954 UNITED STATES OFF-ICE FILTER.

William G.- Landwier. t eriiiafli- LY assi nmt Ea y Washing M ch e C por tion, Smeuse, N. 12, a corporation o! Delaware Application Ju y .18, 0.. Se l o- 1114.39:

.2 Qlaims. (Cl. 210 8 Th s inv ntion relates to filt r and particuia y to a filter d p d ior filte g domestic water of impurities liable to create stain he in in of laundr I filters for domestic washi ma hines, where water is utilized for rinsing, it isdesirable to remove from such Water such ..elements as may cause staining of freshly laundered vclothes. il p id ng pport n ty for water ass @therethrough to expend its staining or discolor.- ability on a filter medium, such as terry cloth, unsized cheesecloth, or other material having an affinity for the staining elements, have been devised. The present invention relates to an improved casing structure, whereby the filter mat rial m y b read y chan d.

In fil r ted or emov n impurities from domestic water supply, it necessary th t the fi b r a y p d for inspection nd replacement of the ,filtering media. It further essential that such filters .be constructed to afford a r t ely ee flow oi water th rethroush. and also to withstand pressures as h ghas 5 to 1.09 .per square inch, which pressures are often present in domestic water supply systems. Additionally, it is desirable to so construct the filter that it maybe made of relatively inexperi sive p s. u ly a semb ed and disassembled. and with the par-ts so designed as to provide .a

fi t r wh ch m be readi y un er tood b th 1 ave ag domest c wate user,- ,It is also e irable to prov de a fi ter which will utili e relatively inexpensive filter material, a d in whi h o ce he fi ter mat r a is placed within t assembly, bypas g of w er around the filter will be prev nted.

The above and other novel features ofthe invention will appear more fully hereinaiter from the following detailed description when taken in conjun t on w h t e accompanying dra in it is .expressely understood that the drawings are emp y d f purp ses Of illustrati n only and a not desi ned as a defin tion oi the l m t oi the inve ti n, refe n e e n has ii r this pm:- pose to the appended claims.

In the drawin s, wherein like reference char.- acters indicate like parts Figure 1 is a long t d nal sect on taken through the filter of the present'inventiqni surc a e tion ake su antially on the lin 2:Zc F re l;

Figure 3 is a ransver ese t cn taken eubstan' ti liv on the li e 3-13 of i u e Figure 4 is a transverse section taken substantie 11y on the Al 4 of Figure .1; and

3 8111 5135 .-a..s..ideze1evational view or the filter with an adapter ring for mountin the filt r in panelanerture.

Refe ring to ;;I'lieure .1 of the drawin s, there is shown a casing comprising opposed end membets 1.!) and [2, The end member 10 is provided with an inlet connection 114 and the end member 12 an outlet member 15. The member 12 has a tapered body section L8, a shallow cone or dome end 29,, and a marginal outwardly tending flange 22 around the periphery .of the larger end of the tapered body section. The .end member 16 1s centrally of .ashallow-oonical shape as at 4 a d provided with a rounded p pheral M5826 and shallow skirt 28,.

isecured to the fiange 2 2 of the casing member 12 is a ring-like annular member .30 having' a return bent flange '32 surrounding the flange 22, the return bent flange being spun around to provide a water-tight engagement with the flange 22 or the body portion 12. Such a nular ring is provided with an inner ed adapted :to cooperate with ,a removable diaphragm 34, the latter being adapted to be seated upon the inside surface of the ring-like member 30, the diaphragm member 34 and annular member 3fi being provided with bayonet-like lugs whereby the partition 34 may be assembled and secured in place by angular rotation.

More particularly, the annular member 3D- is provided with angulafly P ced recesses 35 and intervening :inwardlyfiextendmg portions 38 having a strengthening flange #0, whereas the diaphragm member 34 is provided with uniformly {spaced tongue-like members 42 around its periphery with intervening webs of reduced radius #4, the outer edge thereof being flanges as at 6 for stilfening. The diaphragm 34 may be of a stamping and may be formed or shaped into inner and outer conical or curved section members whereby the diaphragm will be given substantial stiffness against dishing. The outer conieal or curved section portion 48 may also have radial moves it! impre sed therein which extend to the outer periphery of the tonques 42 and which may cooperate with a dimple 52 in the stren thening flange Ml. It will thus be apparent "that the diaphra m 34 may be inserted behind the 'ring -ilike member an by passing the on ues 42 thmu hthe enlarged diameter spaces .35 of the annular ring, Thereafter, by rotatin the diaphr m through an angle of approx-i?- mately 45. the groove may be brought to an angular position such that the dimple 52 will be received therein and under normal operating conditions, such dimple will prevent rotation of the diaphragm except when axially disposed a distance equal to the dimple height and rotated for removal. The inner conical section 54 of the diaphragm is pierced at its apex as at 56 to receive a tension bolt 58, the latter extending out through an aperture Ell in the end member I 0. The annular groove 62 between the inner cone 54 and outer cone 48 is adapted to receive a compression spring 64 which is mounted upon a compression plate at its outer end, as will be described in greater detail hereinafter.

In the groove annular section 26 of the end under normal conditions, the shell structure of the filter is never under any substantial pressure except that produced by the back pressure member Ill, there is positioned a substantially H circular section ring Washer of rubber-like material or neoprene EB, which is adapted to seat upon the outer annular face of the ring mem-- ber 39, there being a slight shoulder in the an- "if nular member 38 as at NJ to hold the ring member in proper circular position. It will be seen that, by reason of the diaphragm 34, and the end member i l and the bolt 58, with its thumb nut 12, the end member [0 is adapted to be securely held against thering member as, and in turn held in proper relationto the shell ii. A suitable washer M may be placed beneath the thumb nut '12 in engagement with the shell It to provide assurance against leakage- Filter media 15, preferably in the form of circular disks of a diameter slightly greater than the maximum inside diameter of the tapered section 18 of the casing 12, are adapted'to be placed in multiple layers within the casing, such disks being supported between the previously mentioned disk 55 and a slightly dished spacermember '58. Such spacer member has its marginal edge 80 soldered or otherwise'secured in the annular corner .82 formed by the juncture of the tapered wall It and the conical wall 2t. Such spacer member 18 may have. transverse diametral grooves 84 and may be notched as at 85 around. the peripheral edge. The disk 86 is secured to the and turn of the spring 54 by upstruck fingers 88 and both disks l8 and 65 are suitably perforated along their entire surfaces in order to permit free flow of medium being filtered therethroug'h.

The filter media may be composed of cloth disks, the cloth being of a type such as terry cloth or the like, affording maximum fibrous surface but also affording free flow therethrough. Such disks, when laid in the conical section It of the end member I2, are compacted around their edges by reason of the differences in diameter and by reason of the pressure plate or (it, the disks being held in such position that their edges are assured contact With the internal surface of the tapered shell 18 to prevent otherwise possible bypass of water around the edges of the filter media with consequent loss of efficiency of the filter.

It will be seen that the filter media It is first inserted into the filter, the end cover ill and diaphragm being removed. Thereafter, the coil spring 6 5 and diaphragm 66 are inserted, the latter being of such diameter as to fit through the enlarged diameter portions of the ring-like member 3t. The coil spring provides light pressure upon the filter disks to hold them compressed and to secure them in place'during assembly. Thereafter, the diaphragm 34 is inserted beyond the ring-like member 36' and given a rotation to actuate or effectuate the bayonet lock. Thereafter, the cover member H], with of the filter media. However, as the filter media collects swarf and gradually clogs, back pressure may be created and the cover member and larger portion of the tapered shell it will become subjected to greater and greater pressures. Also, the

; pressure upon the filter media in an axial direction will be substantial and subject the parts to stress- However, the members iii and i2 forming the shell of the filter, and the diaphragm member. 35, will be seen to be so constructed as to be adequate to withstand the pressures resulting from the gradual clogging effect of the filter media. Such pressures, however, as may be developed will in no way jam the parts so that upon disconnection of the filter from the water source, all the parts may be readily and quickly disassembled, the filter media units washed and replaced, and the same reassembled with little delay and eifort.

' It will be apparent that thevarious members of w ich the filter is composed are readily stamped from heavy sheet metal whereby the construction may be mass-produced economically. If desired, the filter member l2 may have an annular flange 98 secured to its tapered body portion which in turn may be secured to a wall panel 92 of an appliance such as a washing machine, and that the end member is and elements of the filter may be readily removed from the shell and new filter material placed therein, the end shell l2 being conveniently supported by such Wall panel during the operations of disassembly and assembly.

There is thus provided a filter readily adapted to the filtering of domestic Water, particularly for the removal of impurities therein which would result in stainin of laundry, the filter material being of a nature having at least the same affinity for such staining elements asthe laundry, and having adequate capacity to remove all of the staining elements before passage to the laundry. Such filter is so constructed as to sim plify inspection and replacement of the filter material, and at the same time afford strength to resist pressure shouldthe filter be allowed to clog from use over too long a period, or under adverse water conditions.

Although a single embodiment of the invention has been illustrated and described, it is to be understood that the invention is not limited thereto. As various changes inthe construction and arrangement may be made without departing from the spirit of the invention, as will be apparent to those skilled in the art, reference will be had to the appended claims for a definition of the limits of the invention.

What is claimed is: H

l. A filter for domestic water supply for laundry purposes comprising a casing having a tapered Wall and an outlet end wall at the reduced diameter end of said wall, an arched perforate plate seated against said end wall, Woven fabric filter disks of a diameter to assure marginal edge contact with said tapered wall stacked against said plate, a pressure plate resting on the stack of filter disks, an inwardly directed flange at the enlarged diameter end of said wall, a removable diaphragm member supported behind and upon said flange, said diaphragm and flange having inter-engaging bayonet-like projections whereby to facilitate removal of said diaphragm past said flange, a' seal ring positioned on said flange, an inlet cover bearing through said sealing means upon the outer marginal edge of said flange, means for drawing the diaphragm member and cover together to secure the cover in place, and a coil compression spring secured to said pressure plate and bearing against said diaphragm, said pressure plate being adapted to compress said filter material lying between said pressure plate and said arched plate axially of the tapered wall casing, and said casing and tapered wall forming the sole passage for flow of liquid from the inlet cover to the outlet end wall, whereby liquid flow is in a direction axial of the tapered wall casing toward the reduced diameter end thereof and from the pressure plate to the arch plate.

2. A filter for domestic water supply for laundry purposes comprising a casing havingatapered wall and an outlet end wall at the reduced diameter end of said wall, an arched perforate plate seated against said end wall, said casing being adapted to receive woven fabric filter disks of a diameter to assure marginal edge contact with said tapered wall stacked against said plate, a pressure plate adapted to rest upon a stack of filter disks bearing against said arched plate and tapered wall, an inwardly directed flange at the enlarged diameter end of said wall, a removable diaphragm member supported behind and upon said flange, said diaphragm and flange having inter-engaging bayonet-like projections whereby to facilitate removal of said diaphragm past said flange, a seal ring positioned on said flange, an inlet cover bearing through said sealing means upon the outer marginal edge of said flange, means for drawing the diaphragm member and cover together to secure the cover in place, and a coil compression spring secured to said pressure plate and bearing against said diaphragm, said pressure plate being adapted to compress filter material lying between said pressure plate and said arched plate axially of the tapered wall casing, and said casing and tapered wall forming the sole passage for flow of liquid from the inlet cover to the outlet end wall, whereby liquid flow is in a direction axial of the tapered wall casing toward the reduced diameter end thereof and from the pressure plate to the arch plate.

WILLIAM LANDWIER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 183,599 Sinclaire Oct. 24, 1876 639,471 Van Alstine Dec. 19, 1899 2,253,684 Burckhalter Aug. 26, 1941 2,511,800 Wilkinson June 13, 1950 2,578,020 Sandberg Dec.'11, 1951 FOREIGN PATENTS Number Country Date 230,991 Great Britain of 1925 

